Gastroscope



G. LOECK 3 June 14, 1927. 1,632,612

GASTROSCOPE Filed Dec. 1925 CJ/M l WWtO/L:

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Patented is... 14, 1927.1 7

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Application filed Deeemher 18, 1925, Serial No. 76,344, and in "Germany December 19; 1924.

The present invention has for its object toprovide a gastroscopewlnch obviates the danger possibly arising while introducingv the gastroscope hitherto used into the human 5 body. In the customary gastroscopes the gastroscope body is only provided w1t1'1 a lateral look-out aperture. Hence, the lookout'will not be possible to the observer until v the head of the gastroscope has beenintroe I ducedinto the stomach. During'the ntro duction itself the observer is consequently only dependentupon the feeling and there fore, for instance, running the risk of injur ing I during the introduction the oesophagus 5 oi'the individual to be examined- The new gastroscope is ina known way provided with a 1 curved beak for the illuminatingdevlce,

, however, in addition to the lateral look-out aperture it has a, lookout aperture lying in l 20 the axial directionot the gastroscope body.

By using during the introduction an optical tube, inserted into the gastroscope body,

which is constructed for the look-out in its axial direction, it is possible to observe. dur- 2!! ing the introduction in the direction of in: troduction and consequently avoid npu-ies oi the aforesaid kind. Moreover, it is possible to look with such an optical tube throughthe lateral look-out opening obliquely past the point of the beak and thus ascertain that the latter causes no injuries.

. In order tolimpart to the held of the lookout aperture lying in the axial direction, sufiicient luminosity,'it is advisable to construct i the illuminating device in such a way that it also emits light" towards the side of the beak, lying in the direction of introduction Y of the gastroscope, while the usual-illumi-v nating devices are so constructed as only to 40 radiate the held of the laterallook-out aper- 5 The annexed drawing shows asan example 9 the head of a gastroscope according to the invention in a longitudinal section. v

A tube a, formingthe body of he gastroscope, carries at its upper enda beak curved by in the point of which is disposed a glow lamp Z2. On both sides of the latter the tube wall. A Window .d is provided where the principal axis of the'tube strikes PATENT OFFICE I BERLIN, ennmnivrnssienon'ro Fran enone WOLF i o. in. B. rigor BERLIN, GERMANY.

e i v 7' i I i I there are inserted two windows 0 and 0 into ing the gastroscope a tube f is slipped into the tube a, which contains in itself the optical parts. The annexed drawing only represents of these partsthe objective 9*, g and a reversing lens it. l r 7 During the introduction it is possible to observe with the tube f through the'window din the direction ofintroduction as well as observe through the window 6 the part to which the point or the beak is guided. Both parts or the field of'view are eliminated by the glow-lamp Z). V

k The gastroscope having been introduced, the tube f should be ex changed for one of the customary observation tubes, arranged for the lateral look-out through the window 6.

I claim; p 1. Outer tube of a gastroscope, adapted to receive aninner tube destined for observation, the outer tube having a curvedbeak and containing within this beak an illuinina-ting. device, and two windows disposed on the outer tube, theone of these windows lying V laterally and the other lying in the axial di-' rection of the outer tube, both in such a rela{ tive position as to afford a simultaneous look out through both windows with i a single sighting tube." Y v i l 2. Outer tube of a gastroscope, adapted to receive an inner tube destined "for observation, theouter-tube having'a curved beak and containing within this beak an illuminating device, adapted to emit light/in the plane, which is determined by the axis of the outer tube proper and the axis of the beak, toe wards both sides of the beak, and two windows disposed on the outer tube, theone of 

